Grinding-machine.



W. B. HUTHER. GRINDING MACHINE.

APPLICATION FILED FEBJQ, 1909.

1,050,464. Patented Jan.14,1913.

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UNTED STATES TEN T OFFTCE.

WARREN B. HUTHER, 0F ROCHESTER, NEW YORK, ASSIGNOR T0 HUTHER BROS. SAW

MFG. CO., 0F ROCHESTER, NEW YORK,

A CORPORATION' OF NEW YORK.

Gambino-MACHINE.

Specification of Letters Patent.

Patented Jan. 1st, 1913.

Application filed February 19, 1909. Serial No. 478,831.

To all whom t may concern:

Be it known that I, VARREN B. HUH-inn, of Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Grinding- Machines; and I do hereby declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accompanying drawings, forming a part of thisspecicatio-n, and to the referencenumerals 'marked thereon.

The present invention relates to grinding machines of the type employinga rotary grinder and a suitable support for a saw, disk or othersubstantially circular body whose periphery is to be ground, and it hasfor an object to provide a construction in which the grinder operates onthe work in such a manner that plane faces are ground.

Another object is to provide a machine of this type which is simple inconstruction, durable in use and inexpensive to manufacture.

To these and other ends the invention consists in certain improvementsand combinations of parts all as will be hereinafter more fullydescribed, the novel features being pointed out in the claims at the endof the specification.

In the drawings: Figure l is a plan View of a saw jointing machineconstructed in accordance with this invention; Fig. 2 is a sideelevation showing the standard in vertical section; Fig. 3 is alongitudinal section of the work support and coperating parts; and Fig.fl is a detail vertical section on line a-a of Fig. 2.

According to the present invention there may be employed a work supportfor a circular saw or circular body and a rotary grinder relativelyadjustable toward and from each other, the grinder having a plane faceoperating in a plane substantially tangential to a circular body on thesupport. In this embodiment the work support l is adjustable toward thegrinder and for this purpose there may be employed a guide in the formof a bar 2 having angularly arranged faces and tted and secured within ahorizontal pocket 3 that is formed in a cast hollow standard between thetop and the bottom of the latter.

The work support may be of any construction but in the present instanceit entirely surrounds the bar and has two diverging l arms 5 formed attheir upper ends with seats for the circular saw or other work piece 6,a conical weight '7 operating on a vertical stem 8 between the arms tocenter the work. The movement of the work support toward the grinder ispreferably effected by a feeding mechanism in the form of a screw 9 eX-tending longitudinally of the guide beneath the same, operating throughan internally threaded opening in the holder, and journaled in a bracketl0 depending from the outer end of the guide bar, a crank handle 1lserving to effect its rotation.

The grinder l2 is preferably in the form of a cup in order to requireless abrasive material and to house the nuty 13 which secures it to oneend of its shaft la. This shaft la may be mounted in journal box l5formed at the upper end of the standard, the shaft being arranged sothat the turning aXis of the grinder is parallel with the guide bar 2andin this manner a plane grinding face 16 of the grinder operates in aplane tangential to a circular work piece 6 on the holder. A pulley 17is arranged on that end of the shaft la opposite the grinder and servesto drive the latter and its shaft. Vhile the grinder is operating on awork piece the latter lmay be sustained at its periphery by a brace 1Swhich is vertically adjustable on a block 19 that has vertical ways 19Lthereon and is horizontally adjustable on the guide bar 2. A lockingdevice may also be employed for securing the work support against backlash while the work is being operated upon and to this end a set screw20 operates against a friction piece 2l that engages the guide bar 2 atone corner, the engaging end being notched or grooved at 22 to conformto the corner. This arrangement of the locking device draws two rightangularly arranged faces of the support against like faces on the guidebar, thus effectively preventing any movement of the support.

in order to prevent a work piece being fed beyond a certain point whichchanges with work of dierent diameters, there may be provided a stop 23adjustable on the guide bar 2 and carrying a shoulder 24 adapted toccperate with the work holder, the shoulder being preferably in the formof a screw which permits fine adjustment. A set screw 25 may serve tohold the stop in its adjusted position.

ln operation, the ivorl is fitted upon the stem 8 and the centering;Weight is placed in position to retain it on the support and at the sametime to permit its rotation. rlhe stop Q23 is then adjusted tocorrespond with the diameter of the Work and the 'feed screw rotateduntil the stop is engaged by the holder, being secured in this positionby the Afriction piece 2l. rlhe Work majT now be rotated to bringIsuccessive portions ot the periphery into engagement with the grinderwhich is being` driven by a belt or the like passingv about the pulleyl?.

il grinding machine constructed in accordance with this invention willproduce teeth ivith straight edges on a saw of anjT thickn ness, and thestructure for effecting` this result is inexpensive to manufacture,simple in operation and not liable to get out et order.

l claim as my invention:

l. ln a saw grindingv machine the combination With a trame, a, grinderjournaled thereon having a tlat tacej and a guide projecting in front etthe grinder at one side ot the axis thereot and extending parallel withsaid axis5 ot a work support adjustable on said guide relativeljT to thegrinder and a stop on the guide adjustable Aindependently ot the supporttor limiting` the movement ot the latter in one direction.

2. ln a saiv grinding` machine, the combination with a irame,a eupshaped grinder journalod thereon having its edge lying in a plane atright angles to its axis of rotation, and a guide extending in 'front otand below the grinder and arraneed at one side et and parallel to theaxis or the grindery oit a Work support entend-ling` upvvardlj7 'tromthe guide and adapted to hold a Werl; piece horizontally in position toengage the edge ot' the grinder.

3. The combination `vith a standard and a guide bar having angular-lyarranged faces and projecting therefrom, oit a grinder mounted on thestandard7 and a work sup port movable on the guide bar and carrying a:triction piece having a groove to receive a corner formed by two :tacoson the guide bar.

rthe combination with a standard and a `guide extending' ladteiallj7theretrom, ot a grinder mounted on the standard, a Work supportadjustable on the guide9 a block adjustable longitudinally or the gaineand having vertical Ways thereon, and a ,brace adjustable on the Ways.

rlhe combination with a standard and a guide extending` laterallytherirrun and a grinder mounted on the standard., et a Wei-li supportadjustzdde on the guida a stop member also adjustable longitudinally ol'the guide and adapted to be seem-ed in Fixed irsition thereon and a stopscrew carried on the stop member and arranged to cooperate with the WorksujL JTHER.

tvitnesses ltUssnLL B. Ginrrrrrn HAROLD lil. Sliders.

by addressing the Commissioner ot' atents,

Washington, in. tt.

